Yuuka

Overview

Hayase Yuuka is a second-year student at Millennium Science School and the main accountant for its student council, Seminar, in Blue Archive. As an extraordinary mathematical prodigy in a school dominated by science majors, she manages the academy's entire budget. Due to the student council president's frequent absences, Yuuka acts as the primary public face and operational leader of Seminar alongside Noa Ushio.

Appearance

Yuuka has long dark blue/purple hair styled in a two-side-up with triangular hair ornaments, matching purple/blue eyes with red pupils, and a dark mechanical halo accented with cyan lines. Her default attire consists of a black skirt suit under a white jacket with a necktie, black half-gloves, a magazine belt, thick scrunched socks, and black ankle boots. In her track outfit, her hair is tied in a half-up style and she wears a star face-paint accent. Her pajama look features a headband and rabbit-ear bow.

Personality

Yuuka is a dutiful, pragmatic, and serious student who takes a strict approach to rules and budget management. Although prone to scolding others for reckless behavior, she is deeply caring and acts as a responsible caretaker. She often finds herself overwhelmed by the antics of surrounding clubs, occasionally resorting to using an abacus to calm her nerves during stressful situations. Highly rational, she relies on calculations and logic, though she struggles with abstract or unpredictable matters.

Abilities

Yuuka wields twin SIG MPX-K submachine guns referred to as Logic & Reason. She possesses mental calculation abilities akin to a human calculator and can digitize complex financial data in minutes. Being ambidextrous, she utilizes a specially designed calculator. She is also adept at personal finance, managing investments, futures trading, and stocks.

Background

Yuuka was one of the first Millennium representatives to meet Sensei following the disappearance of the General Student Council President. Within Millennium, she managed the crisis involving the Game Development Department's potential club closure, investigated financial irregularities tied to President Rio, and assisted during the False Sanctuary and Ark of Atrahasis operations by leading decryption efforts and providing operational support.

Relationships

Yuuka keeps a strict eye on Sensei's personal spending and daily habits. Within Seminar, she works alongside Noa Ushio, manages the troublesome Koyuki Kurosaki, and deals with the actions of President Rio Tsukatsuki. She shows a notably doting attitude toward Alice Tendou while regularly maintaining authority over Momoi Saiba and Midori Saiba. She also manages C&C, issuing mission assignments to Neru while holding them accountable for facility damage.

Trivia

A prank by Veritas members Hare and Maki involving database alterations spawned a widespread school rumor exaggerating her weight to 100kg. She was the featured character in the official ASMR audio release Yuuka ASMR, and her idol outfit served as the character's first 3D model reveal during an April Fool's special event.